n. [ L. nugacitas, fr. nugax, -acis, trifling. ] Futility; trifling talk or behavior; drollery. [ R. ] Dr. H. More. [ 1913 Webster ]
a. [ L fugacitas: cf. F. fugacité. ] 1. The quality of being fugacious; fugaclousness; volatility; as, fugacity of spirits. Boyle. [ 1913 Webster ]
2. Uncertainty; instability. Johnson. [ 1913 Webster ]